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/**
******************************************************************************
* @file dp83848.c
* @author MCD Application Team
* @brief This file provides a set of functions needed to manage the DP83848
* PHY devices.
******************************************************************************
* @attention
*
* Copyright (c) 2021 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "dp83848.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup Component
* @{
*/
/** @defgroup DP83848 DP83848
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @defgroup DP83848_Private_Defines DP83848 Private Defines
* @{
*/
#define DP83848_SW_RESET_TO ((uint32_t)500U)
#define DP83848_INIT_TO ((uint32_t)2000U)
#define DP83848_MAX_DEV_ADDR ((uint32_t)31U)
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup DP83848_Private_Functions DP83848 Private Functions
* @{
*/
/**
* @brief Register IO functions to component object
* @param pObj: device object of DP83848_Object_t.
* @param ioctx: holds device IO functions.
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_ERROR if missing mandatory function
*/
int32_t DP83848_RegisterBusIO(dp83848_Object_t *pObj, dp83848_IOCtx_t *ioctx)
{
if(!pObj || !ioctx->ReadReg || !ioctx->WriteReg || !ioctx->GetTick)
{
return DP83848_STATUS_ERROR;
}
pObj->IO.Init = ioctx->Init;
pObj->IO.DeInit = ioctx->DeInit;
pObj->IO.ReadReg = ioctx->ReadReg;
pObj->IO.WriteReg = ioctx->WriteReg;
pObj->IO.GetTick = ioctx->GetTick;
return DP83848_STATUS_OK;
}
/**
* @brief Initialize the DP83848 and configure the needed hardware resources
* @param pObj: device object DP83848_Object_t.
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_ADDRESS_ERROR if cannot find device address
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
* DP83848_STATUS_RESET_TIMEOUT if cannot perform a software reset
*/
int32_t DP83848_Init(dp83848_Object_t *pObj)
{
uint32_t tickstart = 0, regvalue = 0, addr = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->Is_Initialized == 0)
{
if(pObj->IO.Init != 0)
{
/* GPIO and Clocks initialization */
pObj->IO.Init();
}
/* for later check */
pObj->DevAddr = DP83848_MAX_DEV_ADDR + 1;
/* Get the device address from special mode register */
for(addr = 0; addr <= DP83848_MAX_DEV_ADDR; addr ++)
{
if(pObj->IO.ReadReg(addr, DP83848_SMR, ®value) < 0)
{
status = DP83848_STATUS_READ_ERROR;
/* Can't read from this device address
continue with next address */
continue;
}
if((regvalue & DP83848_SMR_PHY_ADDR) == addr)
{
pObj->DevAddr = addr;
status = DP83848_STATUS_OK;
break;
}
}
if(pObj->DevAddr > DP83848_MAX_DEV_ADDR)
{
status = DP83848_STATUS_ADDRESS_ERROR;
}
/* if device address is matched */
if(status == DP83848_STATUS_OK)
{
/* set a software reset */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, DP83848_BCR_SOFT_RESET) >= 0)
{
/* get software reset status */
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, ®value) >= 0)
{
tickstart = pObj->IO.GetTick();
/* wait until software reset is done or timeout occured */
while(regvalue & DP83848_BCR_SOFT_RESET)
{
if((pObj->IO.GetTick() - tickstart) <= DP83848_SW_RESET_TO)
{
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, ®value) < 0)
{
status = DP83848_STATUS_READ_ERROR;
break;
}
}
else
{
status = DP83848_STATUS_RESET_TIMEOUT;
break;
}
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
}
else
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
}
if(status == DP83848_STATUS_OK)
{
tickstart = pObj->IO.GetTick();
/* Wait for 2s to perform initialization */
while((pObj->IO.GetTick() - tickstart) <= DP83848_INIT_TO)
{
}
pObj->Is_Initialized = 1;
}
return status;
}
/**
* @brief De-Initialize the dp83848 and it's hardware resources
* @param pObj: device object DP83848_Object_t.
* @retval None
*/
int32_t DP83848_DeInit(dp83848_Object_t *pObj)
{
if(pObj->Is_Initialized)
{
if(pObj->IO.DeInit != 0)
{
if(pObj->IO.DeInit() < 0)
{
return DP83848_STATUS_ERROR;
}
}
pObj->Is_Initialized = 0;
}
return DP83848_STATUS_OK;
}
/**
* @brief Disable the DP83848 power down mode.
* @param pObj: device object DP83848_Object_t.
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_DisablePowerDownMode(dp83848_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
{
readval &= ~DP83848_BCR_POWER_DOWN;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Enable the DP83848 power down mode.
* @param pObj: device object DP83848_Object_t.
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_EnablePowerDownMode(dp83848_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
{
readval |= DP83848_BCR_POWER_DOWN;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Start the auto negotiation process.
* @param pObj: device object DP83848_Object_t.
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_StartAutoNego(dp83848_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
{
readval |= DP83848_BCR_AUTONEGO_EN;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Get the link state of DP83848 device.
* @param pObj: Pointer to device object.
* @param pLinkState: Pointer to link state
* @retval DP83848_STATUS_LINK_DOWN if link is down
* DP83848_STATUS_AUTONEGO_NOTDONE if Auto nego not completed
* DP83848_STATUS_100MBITS_FULLDUPLEX if 100Mb/s FD
* DP83848_STATUS_100MBITS_HALFDUPLEX if 100Mb/s HD
* DP83848_STATUS_10MBITS_FULLDUPLEX if 10Mb/s FD
* DP83848_STATUS_10MBITS_HALFDUPLEX if 10Mb/s HD
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_GetLinkState(dp83848_Object_t *pObj)
{
uint32_t readval = 0;
/* Read Status register */
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BSR, &readval) < 0)
{
return DP83848_STATUS_READ_ERROR;
}
/* Read Status register again */
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BSR, &readval) < 0)
{
return DP83848_STATUS_READ_ERROR;
}
if((readval & DP83848_BSR_LINK_STATUS) == 0)
{
/* Return Link Down status */
return DP83848_STATUS_LINK_DOWN;
}
/* Check Auto negotiaition */
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) < 0)
{
return DP83848_STATUS_READ_ERROR;
}
if((readval & DP83848_BCR_AUTONEGO_EN) != DP83848_BCR_AUTONEGO_EN)
{
if(((readval & DP83848_BCR_SPEED_SELECT) == DP83848_BCR_SPEED_SELECT) && ((readval & DP83848_BCR_DUPLEX_MODE) == DP83848_BCR_DUPLEX_MODE))
{
return DP83848_STATUS_100MBITS_FULLDUPLEX;
}
else if ((readval & DP83848_BCR_SPEED_SELECT) == DP83848_BCR_SPEED_SELECT)
{
return DP83848_STATUS_100MBITS_HALFDUPLEX;
}
else if ((readval & DP83848_BCR_DUPLEX_MODE) == DP83848_BCR_DUPLEX_MODE)
{
return DP83848_STATUS_10MBITS_FULLDUPLEX;
}
else
{
return DP83848_STATUS_10MBITS_HALFDUPLEX;
}
}
else /* Auto Nego enabled */
{
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_PHYSCSR, &readval) < 0)
{
return DP83848_STATUS_READ_ERROR;
}
/* Check if auto nego not done */
if((readval & DP83848_PHYSCSR_AUTONEGO_DONE) == 0)
{
return DP83848_STATUS_AUTONEGO_NOTDONE;
}
if((readval & DP83848_PHYSCSR_HCDSPEEDMASK) == DP83848_PHYSCSR_100BTX_FD)
{
return DP83848_STATUS_100MBITS_FULLDUPLEX;
}
else if ((readval & DP83848_PHYSCSR_HCDSPEEDMASK) == DP83848_PHYSCSR_100BTX_HD)
{
return DP83848_STATUS_100MBITS_HALFDUPLEX;
}
else if ((readval & DP83848_PHYSCSR_HCDSPEEDMASK) == DP83848_PHYSCSR_10BT_FD)
{
return DP83848_STATUS_10MBITS_FULLDUPLEX;
}
else
{
return DP83848_STATUS_10MBITS_HALFDUPLEX;
}
}
}
/**
* @brief Set the link state of DP83848 device.
* @param pObj: Pointer to device object.
* @param pLinkState: link state can be one of the following
* DP83848_STATUS_100MBITS_FULLDUPLEX if 100Mb/s FD
* DP83848_STATUS_100MBITS_HALFDUPLEX if 100Mb/s HD
* DP83848_STATUS_10MBITS_FULLDUPLEX if 10Mb/s FD
* DP83848_STATUS_10MBITS_HALFDUPLEX if 10Mb/s HD
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_ERROR if parameter error
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_SetLinkState(dp83848_Object_t *pObj, uint32_t LinkState)
{
uint32_t bcrvalue = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &bcrvalue) >= 0)
{
/* Disable link config (Auto nego, speed and duplex) */
bcrvalue &= ~(DP83848_BCR_AUTONEGO_EN | DP83848_BCR_SPEED_SELECT | DP83848_BCR_DUPLEX_MODE);
if(LinkState == DP83848_STATUS_100MBITS_FULLDUPLEX)
{
bcrvalue |= (DP83848_BCR_SPEED_SELECT | DP83848_BCR_DUPLEX_MODE);
}
else if (LinkState == DP83848_STATUS_100MBITS_HALFDUPLEX)
{
bcrvalue |= DP83848_BCR_SPEED_SELECT;
}
else if (LinkState == DP83848_STATUS_10MBITS_FULLDUPLEX)
{
bcrvalue |= DP83848_BCR_DUPLEX_MODE;
}
else
{
/* Wrong link status parameter */
status = DP83848_STATUS_ERROR;
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
if(status == DP83848_STATUS_OK)
{
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, bcrvalue) < 0)
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
return status;
}
/**
* @brief Enable loopback mode.
* @param pObj: Pointer to device object.
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_EnableLoopbackMode(dp83848_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
{
readval |= DP83848_BCR_LOOPBACK;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Disable loopback mode.
* @param pObj: Pointer to device object.
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_DisableLoopbackMode(dp83848_Object_t *pObj)
{
uint32_t readval = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
{
readval &= ~DP83848_BCR_LOOPBACK;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Enable IT source.
* @param pObj: Pointer to device object.
* @param Interrupt: IT source to be enabled
* should be a value or a combination of the following:
* DP83848_WOL_IT
* DP83848_ENERGYON_IT
* DP83848_AUTONEGO_COMPLETE_IT
* DP83848_REMOTE_FAULT_IT
* DP83848_LINK_DOWN_IT
* DP83848_AUTONEGO_LP_ACK_IT
* DP83848_PARALLEL_DETECTION_FAULT_IT
* DP83848_AUTONEGO_PAGE_RECEIVED_IT
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_EnableIT(dp83848_Object_t *pObj, uint32_t Interrupt)
{
uint32_t readval = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_IMR, &readval) >= 0)
{
readval |= Interrupt;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_IMR, readval) < 0)
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Disable IT source.
* @param pObj: Pointer to device object.
* @param Interrupt: IT source to be disabled
* should be a value or a combination of the following:
* DP83848_WOL_IT
* DP83848_ENERGYON_IT
* DP83848_AUTONEGO_COMPLETE_IT
* DP83848_REMOTE_FAULT_IT
* DP83848_LINK_DOWN_IT
* DP83848_AUTONEGO_LP_ACK_IT
* DP83848_PARALLEL_DETECTION_FAULT_IT
* DP83848_AUTONEGO_PAGE_RECEIVED_IT
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_READ_ERROR if connot read register
* DP83848_STATUS_WRITE_ERROR if connot write to register
*/
int32_t DP83848_DisableIT(dp83848_Object_t *pObj, uint32_t Interrupt)
{
uint32_t readval = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_IMR, &readval) >= 0)
{
readval &= ~Interrupt;
/* Apply configuration */
if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_IMR, readval) < 0)
{
status = DP83848_STATUS_WRITE_ERROR;
}
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Clear IT flag.
* @param pObj: Pointer to device object.
* @param Interrupt: IT flag to be cleared
* should be a value or a combination of the following:
* DP83848_WOL_IT
* DP83848_ENERGYON_IT
* DP83848_AUTONEGO_COMPLETE_IT
* DP83848_REMOTE_FAULT_IT
* DP83848_LINK_DOWN_IT
* DP83848_AUTONEGO_LP_ACK_IT
* DP83848_PARALLEL_DETECTION_FAULT_IT
* DP83848_AUTONEGO_PAGE_RECEIVED_IT
* @retval DP83848_STATUS_OK if OK
* DP83848_STATUS_READ_ERROR if connot read register
*/
int32_t DP83848_ClearIT(dp83848_Object_t *pObj, uint32_t Interrupt)
{
uint32_t readval = 0;
int32_t status = DP83848_STATUS_OK;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_ISFR, &readval) < 0)
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @brief Get IT Flag status.
* @param pObj: Pointer to device object.
* @param Interrupt: IT Flag to be checked,
* should be a value or a combination of the following:
* DP83848_WOL_IT
* DP83848_ENERGYON_IT
* DP83848_AUTONEGO_COMPLETE_IT
* DP83848_REMOTE_FAULT_IT
* DP83848_LINK_DOWN_IT
* DP83848_AUTONEGO_LP_ACK_IT
* DP83848_PARALLEL_DETECTION_FAULT_IT
* DP83848_AUTONEGO_PAGE_RECEIVED_IT
* @retval 1 IT flag is SET
* 0 IT flag is RESET
* DP83848_STATUS_READ_ERROR if connot read register
*/
int32_t DP83848_GetITStatus(dp83848_Object_t *pObj, uint32_t Interrupt)
{
uint32_t readval = 0;
int32_t status = 0;
if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_ISFR, &readval) >= 0)
{
status = ((readval & Interrupt) == Interrupt);
}
else
{
status = DP83848_STATUS_READ_ERROR;
}
return status;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
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